| 17 Thorney Hedge Road Limited | Professional & scientific | 1992 |
| 172 Brent Crescent Ltd | Real estate | 2019 |
| 172 Shirland RD Ltd | Real estate | 2022 |
| 172/174 Sutherland Avenue Limited | Households | 1989 |
| 17A Frognal AVE Ltd | Real estate | 2023 |
| 17TH Century Health Food Limited | Wholesale & retail | 1997 |
| 17TH Century Holdings Limited | Financial services | 2025 |
| 18 Belsize Park Gardens Management Limited | Households | 1994 |
| 18 Butler Avenue Management Ltd | Real estate | 2014 |
| 18 Logan Road, Wembley, Freehold Limited | Real estate | 2012 |
| 18 Niton Road Freeholders Limited | Real estate | 2024 |
| 18 ST James Square Management Company Limited | Real estate | 1998 |
| 18 Wolverton Gardens Management Limited | Real estate | 2013 |
| 180 Solutions Ltd | Manufacturing | 2003 |
| 182 Iverson Road Freehold Limited | Other services | 2014 |
| 185A Uxbridge RD Management Ltd | Professional & scientific | 2022 |
| 187MOB Ltd | Wholesale & retail | 2019 |
| 188A and 188B Malvern Avenue Limited | Real estate | 2009 |
| 18DEGREESFIJI Distribution UK Limited | Transport & logistics | 2022 |
| 18NORTH Limited | Professional & scientific | 2021 |
| 18THIRTYSEVEN Limited | Real estate | 2015 |
| 19 Bricks Limited | Real estate | 2011 |
| 19 High Street (Harrow on the Hill) Limited | Households | 2021 |
| 19 Welldon Ltd | Real estate | 2016 |
| 1977 Trading Ltd | Wholesale & retail | 2020 |
| 19990302UK Limited | Real estate | 2022 |
| 1NORTHFIELD Limited | Professional & scientific | 2014 |
| 1ST Accountancy and Bookkeeping Services Ltd. | Professional & scientific | 2016 |
| 1ST Care Holding Ltd | Financial services | 2023 |
| 1ST Care Properties Ltd | Real estate | 2017 |
| 1ST Headstone Tyre Ltd | Wholesale & retail | 2026 |
| 1ST Law & Finance Ltd | Professional & scientific | 2015 |
| 1ST Solo Ductwork Services Limited | Construction | 2000 |
| 1ST Souvenirs Limited | Wholesale & retail | 2001 |
| 1ST Stop (a) Limited | Wholesale & retail | 2008 |
| 1ST Stop Properties Limited | Real estate | 2023 |
| 1ZERO8 Real Estate Advisors Ltd | Professional & scientific | 2023 |
| 2 - 6 Buckingham Road Harrow Limited | Households | 2017 |
| 2 a T Design Limited | Construction | 2004 |
| 2 Degrees West Holdings Limited | Financial services | 2018 |
| 2 Eastbury Avenue Residents Limited | Professional & scientific | 1999 |
| 2 Green Street Management Limited | Real estate | 2001 |
| 2 Grove Hill Management Limited | Households | 2022 |
| 2 Junction Road LLP | | 2008 |
| 2 Kenton Road Limited | Households | 2015 |
| 2 Oatlands Road Enfield Ltd | Real estate | 2023 |
| 2 Old 4 Gaming Ltd | Information & communication | 2023 |
| 2 Silver Street Management Company Limited | Households | 2018 |
| 2 Sisters 4 Kids Limited | Other services | 2021 |
| 2-4 Devonshire Road Limited | Real estate | 1973 |
| 20 Rosslyn Road Ltd | Households | 2025 |
| 20&28 Limited | Hospitality | 2026 |
| 20-30 Laurel Park Limited | Extraterritorial | 2015 |
| 2020 Design Trading Limited | Professional & scientific | 2020 |
| 2022 the Avenue Limited | Real estate | 2022 |
| 20A Victoria Road Management Co Limited | Extraterritorial | 2009 |
| 21 Chatsworth RD Limited | Real estate | 2022 |
| 21 Degrees Heating Limited | Construction | 2004 |
| 21 Wood END Road RTM Company Ltd | Households | 2022 |
| 21 York Road Ltd | Real estate | 2013 |
| 215 Balham High Road Management Limited | Households | 2016 |
| 22 Park Road (Residents Management) Limited | Households | 2021 |
| 22 Roxborough Road Management Limited | Real estate | 2010 |
| 222 Healthcare Services Limited | Health & social care | 2021 |
| 229 Alexandra Avenue Ltd | Real estate | 2023 |
| 22MC Limited | Arts & recreation | 2022 |
| 23 Akshar Ltd | Wholesale & retail | 2025 |
| 23 Daxzillion Limited | Households | 2018 |
| 23 Denning Road Management Limited | Households | 1988 |
| 23 Francis Road Ltd | Real estate | 2014 |
| 23 London Road Limited | Real estate | 2023 |
| 23 Pinner View (Harrow) Limited | Extraterritorial | 2012 |
| 237 (Management) Limited | Households | 2000 |
| 23THIRTY Ltd | Construction | 2021 |
| 24 Seven Civil Engineering Ltd | Construction | 2019 |
| 24 Thameside Limited | Households | 2009 |
| 24/7 Amber Plumbing & Heating Limited | Construction | 2005 |
| 24/7 Expert Homecare Ltd | Health & social care | 2024 |
| 24/7 Liquor House Ltd | Wholesale & retail | 2025 |
| 24/7 Roof Repairs Ltd | Construction | 2025 |
| 24/7 Special Couriers Ltd | Transport & logistics | 2018 |
| 247 Legals Limited | Administrative & support | 2020 |
| 247BUNKERS Limited | Other services | 2019 |
| 24H ABC Plumbing & Drainage Limited | Construction | 2026 |
| 25 Corbins Lane Management Limited | Households | 2016 |
| 25 North Audley Limited | Households | 2004 |
| 25 Ranelagh Road Wembley Limited | Households | 2022 |
| 25 the Grove (Freehold) Limited | Real estate | 2025 |
| 25-31 Clifton Road Freehold Limited | Real estate | 2018 |
| 25-36 Saffron Close Limited | Administrative & support | 2024 |
| 25/29 Chester Road Northwood Limited | Households | 1990 |
| 250 SWB Limited | Wholesale & retail | 2017 |
| 251 Events Limited | Hospitality | 2025 |
| 252 Old Brompton Road Limited | Households | 2001 |
| 259 Honeypot Lane Stanmore Limited | Real estate | 2026 |
| 26 Second Avenue Ltd | Real estate | 2020 |
| 268-274 Headstone Lane (Freehold) Limited | Real estate | 2026 |
| 26BUTLERRD(HARROW)(FREEHOLD) Ltd | Households | 2022 |
| 27 BS West Limited | Real estate | 2016 |
| 27 Hamilton Road Freehold Limited | Households | 1992 |